According to this meme, turning 19 means your teen years are about to roll the credits. One more episode, then adulthood starts streaming.
He’s sitting there all confident, coffee in hand, basically waiting for someone to argue that 19 isn’t the real ending. But honestly, once you hit 20, there’s no teen left in the number.
It’s the last hurrah for being a teenager, so you might as well celebrate like it’s a series finale.